var express = require('express');
var app = express();
app.get('/', function (req, res) {
	res.send('Hello World');
})
var server = app.listen(8081, function () {
	var host = server.address().address;
	var port = server.address().port;
	console.log("应用实例，访问地址为 http://%s:%s", host, port);
})